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Binary and Unix Operations Quiz
Test your knowledge on binary representations and Unix commands with this engaging quiz! Whether you're a student, teacher, or simply a tech enthusiast, challenge yourself with ten thought-provoking questions.
Topics include:
- Binary number systems
- Unix command line operations
- File linking in Linux
- Fixed-point representation
Bn-1 * 2n-1 + bn-2 * 2n-2+ ... + b1 * 21 + b0 * 20 defines
Natural binary representation of non-negative integrers
Sign-magnitute representation of integrals
Floating-point representation of real numbers
Two’s complemenent representation
An 8-bit microprocessor subtracted 70H from B0H in two’s complement representation. The result and staes of flags (C-carry, V-overflow) are:
140H, C=0, V=1
40H, C=1, V=0
40H, C=1, V=1
45H, C=1, V=1
The value of -25.375 was encoded in fixed-point representation with a sign bit, 8 bits of an integer part and 7 bits of a fraction. The result is:
C30H
8C30H
CH0H
8CB0H
The value of 25.375 was encoded in fixed-point representation with a sign bit, 7 bits of an integer part and 8 bits of a fracion. The result is:
9906H
9960H
1906H
1960H
A Unix command ls –l /usr/bin 2>> ls.txt means:
List the /usr/bin directory contents, redirecting ls output to the ls.txt file
List the current directory contents, appending ls output to the ls.txt file
List the /usr/bin directory contents, redirecting ls output to the ls.txt file
List the /usr/bin directory contents, appending ls output to the ls.txt file
A Unix command ls –l /usr/bin 1> ls.txt means:
List the /usr/bin directory contents, redirecting ls output to the ls.txt file
List the current directory contents, redirecting ls output to the ls.txt file
List the /usr/bin directory contents, appending ls output to the ls.txt file
List the /usr/bin directory contents, redirecting ls error output to the ls.txt file
Links in Unix/Linux DO NOT have the property:
A hard link may represent a file outside the current filesystem
The main purpose of a hard link is naming the file or directory
When a hard link is deleted, the link is removed but the contents of the file itself continue to exist until all links to the file are deleted
A hard link may represent a directory in the current filesystem, but a user may not create it directly
Links in Unix/Linux have the property:
A hard link is a special file containing the relative path to a target file
A hard link may represent a file outside the current filesystem
When a hard link is deleted, the link is removed but the contents of the file itself continue to exist until all links to the file are deleted
A user may create a hard link to represent a directory in the current filesystem
The command: lm@arch: ~% ls /usr/bin/ | grep ‘[^e-g]grep$’
Will match the filenames in /usr/bin that end with one of the characters ‘’’, ‘e’, ‘f’, ‘g’ followed by word grep
Will match the filenames in /usr/bin that end with a character other than ‘e’, ‘f’, ‘g’ followed by word grep
Will match the filenames in /usr/bin that end with one of the characters ‘’’, ‘e’, ‘,’, ‘g’ followed by word grep
Will match the filenames in /usr/bin that contain the string [^e-g]grep$
The command: lm@arch: ~% ls /usr/bin/ | grep ‘^[cg]++’
Will match the filenames in /usr/bin that end with either c++ or g++
Will match the filenames in /usr/bin that start with either c++ or g++
Will match the filenames in /usr/bin that contain ^[cg]++$
Will match in /usr/bin the filenames c++ and g++
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